function checkLogin($cookie_session_id) {
		if(empty($_COOKIE['sessionid']))
	}

	function login($username, $pass)
	{
		$pass = md5(md5($pass));
		$username = $this->db->escape($username);
		$this->db->where ("username", $username);
		$user = $this->db->getOne ("users");
		if(!$user)
		{
			return false;
		}
		$db_pass_hash = $user['password_hash'];
		if($pass == $db_pass_hash)
		{
			$_SESSION["login_hash"] = md5($username.$pass);
			return true;
		}
		return false;
	}